I have always contemplated this question,but I can never really decide if this is true.I mean chess players who are good may not be as smart as their chess is good.Also,not so good players may be very smart.So what would you all think?Does it really improve your iq?
Blitz chess makes you smarter if you raise yourself to the level where you can think quickly and execute a sound chess strategy without succumbing to the pressures of a finite time limitation. To do this effectively, you will inevitably have to study a lot of chess, familiarize yourself with openings, end games, tactics, traps, and chess theories.
If you decide to play chess without time limitations, then the lack of a time element will decrease the overall pressure and cause you to rely upon excess time as a crutch.
I would like to add to this point. I believe in our every day it could be helpful to apply the theories behind chess. For example, we think of all of our plausible move when playing chess. Why not life?
Talk about disappearing up your own egg!!!